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Jolly Bulb with Gauge
Jolly Bulb with Gauge (Product Code: SLE/PHY/194) is a gas-pressure apparatus used to study how the pressure of a fixed volume of air changes with temperature in school and college physics practicals. It comprises a thin-walled spherical bulb connected to a mechanical pressure gauge, which gives instant pressure readings without the inconvenience of a manometer. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Key Details
| Parameter | Detail |
|---|---|
| Bulb | Thin-walled spherical bulb |
| Gauge | Mechanical pressure gauge connected to the bulb |
| Advantage | Instant pressure readings, avoiding the inconvenience of a manometer |
| Clamp | Not included |
| Product code | SLE/PHY/194 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Jolly Bulb Used For?
The bulb is clamped so that it sits fully under water in a heated bath, alongside a thermometer. As the water is warmed in stages, students wait for each temperature to settle and read the pressure straight off the gauge. A graph of pressure against temperature gives a straight line, and extending it back to zero pressure gives an estimate of absolute zero — the classic pressure law practical.
Because there are no liquid columns to balance, readings are quicker than with a manometer, which suits large classes using physics lab instruments in India. Keep the bulb clear of the bottom of the heated vessel, stir the bath before each reading, and handle the thin-walled bulb gently without over-tightening the clamp.
What to Specify When Ordering
- A retort stand and clamp, since the clamp is not included.
- A beaker for the water bath and a thermometer, if your lab needs them.
- Number of Jolly bulb sets for your practical groups.
OEM Manufacturer
Jain Scientific Equipments Private Limited, which trades as ScienceLab, is the OEM (original equipment manufacturer) of the Jolly bulb with gauge and makes it at its own licensed factory at Saha, Ambala, Haryana. Schools, colleges, dealers and importers in India and international markets receive it factory-direct.
Because the manufacturer prepares every quotation itself, you can come back later for extra sets or a replacement bulb — just ask us. Company background is on the ScienceLab profile.
Related Physics Lab Equipment
These items complete a pressure law set-up with the Jolly bulb:
- Retort Stand — supports the bulb in the water bath.
- Retort Clamp Three Finger — a clamp to hold the apparatus, as none is included.
- Glass Beaker — serves as the water bath.
- Immersion Thermometer — measures the bath temperature.
- Manometer, Glass — the traditional alternative for reading gas pressure.
Browse more in Physics Lab Equipment.
Frequently Asked Questions
What does the Jolly Bulb with Gauge consist of?
The Jolly Bulb with Gauge consists of a thin-walled spherical bulb connected to a mechanical pressure gauge. The clamp is not included, so the bulb must be held with a retort stand and clamp during experiments.
Why use a gauge instead of a manometer?
The gauge on the Jolly Bulb with Gauge gives instant pressure readings, reducing the inconvenience of setting up and reading a manometer. Students read the dial directly instead of measuring the difference between liquid levels.
Is a clamp included with the Jolly Bulb with Gauge?
No, a clamp is not included with the Jolly Bulb with Gauge. Add a retort stand and clamp to your enquiry if your lab needs them, and we will include them in the quotation.
What experiment is the Jolly Bulb with Gauge used for?
The Jolly Bulb with Gauge is used for pressure law experiments, where the pressure of a fixed volume of air is read at different water-bath temperatures and plotted to show a straight-line relationship and estimate absolute zero.
Who manufactures the Jolly Bulb with Gauge?
The Jolly Bulb with Gauge is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab) as the OEM, at its own licensed factory in Saha, Ambala, Haryana, India, and is supplied direct from the factory.
What pressure range does the gauge cover?
The gauge range of the Jolly Bulb with Gauge is not stated in our current listing. Contact us before ordering if your experiment needs a particular range, and we will confirm the details for you.
Request a Quote
To get a price for the Jolly Bulb with Gauge, use the contact page or add it to the enquiry cart. Quotations come directly from the manufacturer and can include stands, clamps and thermometers.
Last updated: 24 September 2026
